A.four-stroke
B.two-stroke
C.slow speed
D.reversible
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A.defrosting
B.de-oiling
C.demulsifying
D.dehumidifying
A.overlap
B.crush
C.lap or lead
D.protrusion
A.spraying directly on the base of the fire
B.flowing the foam down a vertical surface
C.sweeping the fire before you with the foam
D.spraying directly on the surface of the fire
A.to increase
B.to speed up
C.to prevent
D.to reduce
A.in order that
B.because of
C.in order to
D.owing to
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